| Llantwit Major to Desert Hot Springs (California) | 5,284.15 mi (8,504.01 km) |
| Llantwit Major to DeSoto (Texas) | 4,632.28 mi (7,454.93 km) |
| Llantwit Major to Destin (Florida) | 4,321.36 mi (6,954.56 km) |
| Llantwit Major to Destrehan (Louisiana) | 4,504.03 mi (7,248.54 km) |
| Llantwit Major to Detroit (Michigan) | 3,622.11 mi (5,829.23 km) |
| Llantwit Major to Diamond Bar (California) | 5,324.47 mi (8,568.91 km) |
| Llantwit Major to Diamond Springs (California) | 5,157.45 mi (8,300.11 km) |
| Llantwit Major to Dickinson (North Dakota) | 4,138.32 mi (6,659.98 km) |
| Llantwit Major to Dickinson (Texas) | 4,720.88 mi (7,597.53 km) |
| Llantwit Major to Dickson (Tennessee) | 4,082.37 mi (6,569.94 km) |
| Llantwit Major to Difficult Run (Virginia) | 3,542.29 mi (5,700.76 km) |
| Llantwit Major to Dinuba (California) | 5,233.16 mi (8,421.96 km) |
| Llantwit Major to Discovery Bay (California) | 5,225.54 mi (8,409.70 km) |
| Llantwit Major to Dix Hills (New York) | 3,294.20 mi (5,301.51 km) |
| Llantwit Major to Dixon (California) | 5,201.76 mi (8,371.43 km) |
